复杂性理论在气固流体床流型识别中的运用

Application of Complexity Theory on Identification Flow Regimes in Gas-solid Fluidized Bed

提取复杂性理论中的涨落复杂性Cf及算法复杂性C(n)参数对气固流化床压力脉动信号随流化床操作气速增大历经不同流型的变化趋势进行分析。研究结果表明,在起始流化至鼓泡态转变的过程中,气-固体系会进行一种所谓的“重构”现象,复杂性参数能明确地指示固定床、鼓泡流化及湍动流化等不同流型之间的转变过程,为流型识别提供了新思路。

Fluctuation complexity Cf and algorithm complexity C(n) have been adopted to analysis pressure fluctuation signals from a gas-solid fluidized bed, the variation of the two complexity parameters with gas velocity from fixed bed,bubbling fluidization to turbulence fluidization are studied in order to characterize regime behaviors. It is demonstrated that there exists a phenomenon named 'recorded' in the regime transition from fixed bed to bubbling fluidization, complex parameters are believed to be a new technique for flow regime identification.